Chapter 11 There are only three large retrospective studies of MV in veterinary medicine (Table 11-1). Another set of four studies researched specific populations of canine patients (see Table 11-1). The prognosis for survival to discharge varies greatly depending on the primary disease process. Survival to discharge is reported to be up to 86% for animals with toxicoses, who are usually younger patients with reversible causes and no pulmonary parenchymal disease; 40% for those with pulmonary contusions; and 11% for post–cardiopulmonary resuscitation (CPR) patients (Hopper, 2007). The overall prognosis ranges from 21% to 71% in dogs and from 15% to 42% in cats (see Table 11-1). • Mode A/C (or CMV) to provide maximum ventilatory support until the patient is stabilized. Some clinicians initially use “hybrid” modes such as SIMV. • Peak airway pressure of 15 to 25 cm H2O. • Tidal volume of 10 ± 2 ml/kg, although in severe hypoxemic failure (“protective lung strategy”), tidal volumes are aimed for smaller than normal volumes (4 to 6 ml/kg). • Respiratory rate of 20 breaths per minute. • Inspiratory time of 1 sec, giving an inspiratory : expiratory ratio of 1 : 2. • PEEP 2 to 5 cm H2O, although higher levels of PEEP can recruit and prevent derecruitment of alveolar units (“open lung strategy”).
Ventilator Therapy for the Critical Patient
Prognosis
Choosing the Correct Settings of the Mechanical Ventilator
Ventilator Therapy for the Critical Patient
